The Xeon L5420 2.5 GHz Quad Core Second Processor from Dell is designed to enhance the performance and the speed of your system. This processor features 1333 MHz bus speed and an integrated L2 cache gives the processor core faster access to larger amounts of the data used most often. Packed with more features, the Xeon L5420 2.5 GHz Quad Core Second Processor is the ideal choice for virtually all of your data demanding or standard enterprise infrastructure applications.